Sticky lock and scripted operation. Feature for PHD2 Broker?

[Kaban]

Hello.

I use PHD2 Broker and works pretty well. 

I would love to see the option to chose a sticky lock position with a script. Maybe using Broker or just a plain script.

If anybody could help with this i would be very grateful.

In this way i could experiment trying to send a guiding star to a fixed position on the chip so that my target star for spectroscopy would sit on the slit.

Thank you.

David Cejudo.

Observatorio El gallinero.

El berrueco (Spain).

[bw_m...@earthlink.net]

Hi David.  I think it would be a good idea to work through the process manually to be sure it would really do what you want. In particular, to be sure a sticky lock position really behaves the way you think.  There’s no point implementing this sort of thing without knowing it’s really going to solve your problem.

 

Regards,

Bruce

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[Kaban]

Hello, Bruce.

Yes, i tested it manually and it works. 

If i guide on the target star i just write down the slit center coordinates in the Adjust Lock Position window and after a short time the starts sits in the very center of the slit.

If i guide on another star (i usually do this) i measure the offset from my target star to the center of the slit and add it to the guiding star position in the Adjust Position Window. Again, after a short time the target star is placed in the center of the slit.

To measure the offset i can use a plate solve script that correlates RA, Dec with x, y pixels.

I would also need PHD2 to save a picture for plate solve, of course.

So the whole script would do:

-start guiding

-save one image

-plate solve

-calculate the offset

-add it to the Adjust Lock Position and write it down

I can do the script for the plate solve and offset calculation, but not the "save image" and "write it down."

Thanks.

David.